@article{DE_1983_19_8_a21,
     author = {N. A. Izobov},
     title = {Refinement of bounds for highest exponents in the freezing method},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1454--1456},
     publisher = {mathdoc},
     volume = {19},
     number = {8},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_8_a21/}
}